User Manual

Pro Tools Reference Guide534
Enclosure digital sources come standard with Avid
HD audio interfaces and are labeled on-screen as
[Encl] versions, to differentiate them from digital
inputs and outputs available on the Digital card in-
stalled in HD I/O. For example, the AES/EBU in-
puts and outputs that come standard in the HD I/O
enclosure are identified as AES/EBU [Encl].
The additional digital ports on the HD I/O are
TDIF, AES/EBU, and ADAT. Pro Tools can only
receive digital audio from one of these ports at a
time.
Inputs on the HD I/O enclosure I/O and Digital
card can be used simultaneously. For example, on
an HD I/O, it is possible to clock off a source from
one of the enclosure inputs and have another digi-
tal input from the digital ports doing a sample rate
conversion, thus having two digital sources.
Pro Tools Audio Interface Digital
Options
003, 003 Rack, and 003 Rack+ include S/PDIF
and ADAT digital I/O.
Eleven Rack includes S/PDIF and AES/EBU
digital I/O.
Mbox (3rd generation) include only the S/PDIF
digital option.
All digital outputs are active at all times, so you
can actually send digital audio to different digital
devices simultaneously at mix time.
Recording from Digital Sources
To record from a digital source with Pro Tools:
1 Connect the digital output of the recording
source to the appropriate digital input of your
audio hardware.
2 If you want to start a new session with a differ-
ent sample rate, do the following:
• Choose
File > New Session
• Select the sample rate.
• Configure the rest of the New Session dialog
accordingly.
• Click
Save.
3 Specify the format (digital) of the inputs of the
audio interface to which the digital recording
source is connected:
• Choose
Setup > Hardware.
• Choose the audio interface.
• Select the digital format for the appropriate
channel pair (such as AES/EBU or S/PDIF).
4 For Pro Tools Ultimate, select the appropriate
Clock Source in the Session Setup window or
Hardware Setup dialog.
5 Create a new stereo audio track.
Some Pro Tools audio interfaces only have
two channels that can be set for analog or
digital. For example, Mbox (3rd generation)
has S/PDIF L–R (Stereo) digital inputs and In
1–2 analog inputs. Mbox (3rd generation)
can record through analog and digital inputs
simultaneously.